[MacTUG] Previously Downloaded OS X Installers No Longer Work

[Matthew Oliver]

What we do is immediately turn any downloaded app store OSX.app installer into a bootable usb installer or an iso image. I can’t see either of those two expiring in fact we’ve used some of our usb installers for quite some time.

Making a USB installer is easy with the createinstallmedia utility

Making an iso is  bit more involved but useful if you want to install OS X in vm for example.

#!/bin/bash
 
 # Mount the installer image
 hdiutil attach /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/SharedSupport/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/install_app
 

 # Create the ElCapitan Blank ISO Image of 7316mb with a Single Partition - Apple Partition Map
 hdiutil create -o /tmp/ElCapitan.cdr -size 7316m -layout SPUD -fs HFS+J
 

 # Mount the ElCapitan Blank ISO Image
 hdiutil attach /tmp/ElCapitan.cdr.dmg -noverify -nobrowse -mountpoint /Volumes/install_build
 

 # Restore the Base System into the ElCapitan Blank ISO Image
 asr restore -source /Volumes/install_app/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase
 

 # Remove Package link and replace with actual files
 rm /Volumes/OS\ X\ Base\ System/System/Installation/Packages
 cp -rp /Volumes/install_app/Packages /Volumes/OS\ X\ Base\ System/System/Installation/
 

 # Copy El Capitan installer dependencies
 cp -rp /Volumes/install_app/BaseSystem.chunklist /Volumes/OS\ X\ Base\ System/BaseSystem.chunklist
 cp -rp /Volumes/install_app/BaseSystem.dmg /Volumes/OS\ X\ Base\ System/BaseSystem.dmg
 

 # Unmount the installer image
 hdiutil detach /Volumes/install_app
 

 # Unmount the ElCapitan ISO Image
 hdiutil detach /Volumes/OS\ X\ Base\ System/
 

 # Convert the ElCapitan ISO Image to ISO/CD master (Optional)
 hdiutil convert /tmp/ElCapitan.cdr.dmg -format UDTO -o /tmp/ElCapitan.iso
 

 # Rename the ElCapitan ISO Image and move it to the desktop
 mv /tmp/ElCapitan.iso.cdr ~/Desktop/ElCapitan.iso






On 2016-03-04, 11:04 AM, "mactug-bounces at lists.uwaterloo.ca on behalf of Donald Duff-McCracken" <mactug-bounces at lists.uwaterloo.ca on behalf of dsmccrac at uwaterloo.ca> wrote:

>Thanks for that tip marlon
>
>I do not have a computer to test this on (to see if the expired cert will give me grief, but I have downloaded new copies of El Cap, Yosemite, Mt Lion & Lion for my local archive, just in case!
>
>
>------------------------------------
>Donald Duff-McCracken 
>Technical Services Manager
>Mapping, Analysis & Design
>Faculty of Environment
>University of Waterloo
>(519) 888-4567 x32151
>https://uwaterloo.ca/environment-computing/about/people
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>On 2016-03-04, 9:33 AM, "mactug-bounces at lists.uwaterloo.ca on behalf of Marlon A. Griffith" <mactug-bounces at lists.uwaterloo.ca on behalf of m3griffi at uwaterloo.ca> wrote:
>
>>"""
>>"A certificate is required for every app in the Mac App Store and it
>>turns out that all of the various OS X installers had a certificate that
>>expired in February 2016. Pretty much every app affected by this has
>>already been updated already so if you download something now, it won’t
>>have any issues. However, if you’re like me and like to keep a bootable
>>install disk or USB drive around for troubleshooting, you’ll need to
>>download the installer again and remake your USB drive." lifehacker
>>
>>Happily, this is an easy problem to fix ahead of time:
>>
>>     Delete any old OS X installers in the Applications folder or in
>>other locations (be sure to look on external hard drives too; if the App
>>Store detects an old installer, it won’t let you get a new one). These
>>installers have names like Install OS X El Capitan and Install OS X
>>Yosemite.
>>
>>     Open the App Store app by choosing Apple menu > App Store.
>>
>>     Click the Purchased tab. Enter your App Store password if prompted.
>>
>>     Scroll down to the OS X installer you want and click Download.
>>
>>http://tidbits.com/article/16302
>>"""
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